1-Gallon Glass Mason Jars with Airtight Metal Lids, 2-Pack - Kitchentoolz

The Extra-Large Jar for Serious Fermenting and Bulk

These are the big ones. Each Kitchentoolz 1-gallon jar holds a full 128 ounces and stands about 10 inches tall with a 4-inch wide mouth, and this is the two-jar pack, which is the practical way to buy them since fermenting almost always means running more than one batch at a time.

They are the jars people reach for when brewing kombucha or kefir in volume, fermenting big batches of pickles or sauerkraut, water-glassing eggs, or storing bulk dry goods like flour, legumes, and pasta. Made in the USA from strong clear glass, they keep your food on inert glass, and the extra-wide opening means you can get a whole hand inside for filling, packing, and cleaning. For anyone who ferments or buys in bulk, two big glass jars replace a stack of plastic tubs.

Each closes with a twist-on metal lid that seals airtight and is simple to use one-handed, which is part of why these oversized jars are so popular for fermentation projects.

The Honest Tradeoffs

1. The honest detail for a microplastic-free kitchen is the lid liner, and the manufacturer states it plainly: the airtight seal comes from a plastisol liner, a BPA-free PVC and polyethylene coating, on the inside of the metal lid. 

2. That liner is the sealing surface. It is BPA-free and your food sits in the glass below, but it is a plastic liner rather than a glass or silicone seal, so the lid is the one place plastic enters. 

3. For dry storage the liner barely contacts the food, while for a full jar of liquid or ferment there is more contact at the top. 

4. If you want zero plastic at the seal, an all-glass or glass-lid jar is the alternative. 

5. Beyond that, the metal lid should be hand washed even though the glass is dishwasher safe, and a full gallon of glass is genuinely heavy and breakable, so it wants a stable, low spot rather than a high shelf.

True Shift Score: 8.4 / 10

This is our own assessment, not a lab result or a certification.

It scores well as a huge, made-in-USA glass jar that replaces a stack of plastic tubs for fermenting and bulk storage, keeping your food on glass with a convenient one-piece metal lid. It stays in the 8s, well below the 9.0 we give its all-glass-lid sibling and the 8.9 we give the wood-lid version, for one honest reason: the airtight seal comes from a plastisol plastic liner inside the metal lid rather than a glass lid or a silicone gasket. It is BPA-free and the food sits in glass, but a plastic sealing surface is a real deduction in a collection built on getting food off plastic, and that is a fault rather than a limit inherent to the format, since the very same jar is sold with a glass lid. Add the sheer weight of a full gallon and this is a good, useful jar rather than a top-tier one. For big-batch fermenting and bulk storage on a budget, it is still a solid choice.

When Something Else Is the Better Fit

• For a slightly more manageable size with the same use, the Kitchentoolz 64oz half-gallon jars are the smaller version.
• If you want no plastic at the seal at all, the very same jar comes with an all-glass lid (our 9.0) or an acacia wood lid (our 8.9), both of which seal without a plastic liner and score higher here for exactly that reason.
• You can also replace the lids you already own with 316 stainless steel lids, the highest-scoring swap in the collection.
• This Kitchentoolz gallon jar is the pick when you want the biggest made-in-USA glass jar for serious fermenting and bulk storage.

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